Seed yield and subsequent emergence pattern of subterranean clover cultivars in response to summer rain
At Lincoln University, Canterbury, seven subterranean cultivars rated in Australia as having different levels of â€˜hardseedenessâ€™ were established. Monocultures were sown in autumn and allowed to grow and set seed. Seed yields ranged from 340 to 1050 kg/ha. Heavy rain in early January 2016 resulted in a â€œfalse strikeâ€ of â‰¤ 4.0% of seeds during the subsequent dry February. A second emergence event in March also resulted in a â€œfalse strikeâ€ with a further 7 to 15% of total seeds lost. However, cultivars established >1000 seedlings/m2 after early winter rain, which is considered adequate for future persistence. Emergence was consistent with Australian hardseededness rankings. Cultivars with hardseed ranks <4 may be more suitable for dryland systems in New Zealand due to their early emergence and the ability to exploit the late summer and autumn rains.
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